A whiff from the gutter!
Occasionally I get a message from a scammer. Of course, they don't have 'Scammer123' as their title, but I know they're a scammer right off the bat.They'll be telltale signs that I won't describe, coz that's what they want. And they've even pretended sometimes to be genuinely unknowing and want to know how I can perceptively know they're a scammer, so easily.
So how do I respond? Well I certainly don't tell them how I know they're a scammer. And don't tell them, people! What I do is send them a message before a short pause, then hit the block button.
What message do I send? It probably varies, but it'll be something like this: "Scammers don't know how obvious they are! Hahaha! I'm not calling you a scammer, I'm just making a statement! Hahaha!"
The reason I make a statement and not an accusation, is to prevent them from going to CS admin, and try and report me. Like them trying to turn the tables on me.
But I do make it quite obvious that I am calling them out as a scammer. Sometimes I may even mention what I think of scammers, which isn't pretty. But on the same token, I make sure I mention that I'm not calling them a scammer, but the message will otherwise seem to suggest that in fact I do think they're a scammer!